Improvement in grate-babs



o. H. TAYLOR, OF'BROOKLYN, N'n-WroRK.'

Leners Patent No. 80,574, dated Angina 4, 1868.

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To ALL WHOM 1T MAY CONCERNE Be it known that I, O. H; TAYLOR, of the city of' Brooklyn, in the county of Kings,v and State of New York, haveinveuted new and useful Improvements in Grate-Bars; and I do hereby declare' that the following is a full and exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon, making a part of this specification, in which- Figure I is aside elevation of my improved grate-bar.

Figure II is a top plan view of Fie. I.

Figure III is a transverse sectional elevation of two bars, showing the manner in which they are secured to eachother. l

Figure IV is also a transverse sectional elevation of a single bar.

Figure V represents the key by which the bars are secured to Aeach other.

My invention has for its object the construction oi' a grate-bar, in such a manner,` and upon suchprinciples; as to render it far more durable and efficient in its eieets, the nature of which consists in making the top of the bar in an oval or round form', and serrating oreorrugating the sides at a suitable angle, in combination with a truss and arch-work underneath and pendent-to the bar, the said' truss-Work and` arch being east rigidly to the bar.

It also consists in forming a lock on the sides of the bars, where they rest or form a bearing against each other, in'such a simple and novel manner that they may be readily removed; but, whilein their position, each bar firmly and rigidly supports its neighbor, thus making a. strong and durable hre-grate, from the fact that, by

means'of the open truss-work, which is essential to the strenth and support of the gratefbar, it is kept compara- I D tively cool, for the reason that the current of 'air 'rushing through the bars into the {ire-chamber also passes more' or less through the truss-work. l v

It will be observed that, by my invention, great strengthl isgiven to the support of my bar, as it combines two fundamental principles oi' architecture, the truss and arch.

To enable others skilled in the art to make and useinyinvention, I will proceed to describe its eonstruction Letters of like name and kind indicate'like partsin each of the iigures.

A represents thetop of my improved bar for fire-grate, which is made oicast iron, and may be made in an oval, round, or in thc ordinary form, with corrugations or serrations, as shown` at c c c c, made alternately upon each sido oi' the said bar A, at an angle oi' Yabout forty-tive degrees, so als to permit a free passage of air through the same into theufuel, and'thereby facilitate combustion to an extraordinary'extent, the said serratons being inode in the manner as shown in the drawings.v

It will be observe-:1 that the corrugations or serrations are made in such amanner as to preserve unbrokenthe longitudinal line ofthe bar at the point wherethered lines S S intersect eachother, and, when the bars or grates are arranged in the furnace, also to preserve unbroken the transverse lines, as shown by the red line at U, so as not t-o interfere with the slicing or raking the re.

It will also be observed that, ii' corrugations are carried from a point below the line Uaround the top of the bar, it greatly interferes with raking the fire, and thusSubjectsth'e fireman to great inconvenience as well as'loss of time in keeping his fire-in order.

B B represent lugs, made on 4each side of the'bar, so as toiorm a bearing for the support of'each against any lateral movements. A v

F F represent slots, made tapering, on each side of the lug B, for the purpose of admitting the key D, shown in Figs. III and V. When the' bars are in their proper places, vand the saidv key D is inserted, it forms a strong support and lock to the same. In case it is desired ,to remove any of the'bars from thefurnace, by simply driving out thekeys, releases them,` so that they o'r any one ofthe bars may be readily removed without disturbing its neighbors. A

H H represent the, respective endsof the bar A, one end of which has a bearing on the bridge-Wall, andl the other-ion the furnace-front, in the common or ordinary manner. In each endof the said har A, and on the bearings H H, are grooves a a a a, for the purpose of allowing a better circulation of air.

J J represent the lower portion of the arch, which, together with the truss-work P P, support the bar A The advantages of the bar A, arch J, and trussworlc P P are readily seen from the fact that the greatest amountl` of strength is gained from the smallest amount of metal; at the same time the bar or anypof its component parts are not liable to become overheated, while at the same tinle it is all cast or made as one piece. l

' l It will be'observcd that the corrugations or serrations in thertop of the bar A are made no 'deeper tha shown by red lines S S, running from the lines X X at an angle to the line U, as clearly shown in Figs. III and IV. The thickness of the truss-work is shown by" the dotted lines in Figs. III and IV. i

The operation ofv a furnace, the grating, of which is formed with my bars, and the fuel properly arranged over their tops, and supplied with air from their under sides, for the purpose of combustion. Theair gains access to the fuel by passing up between the bars in the ordinary rnanner, but, instead of the fuel lying upon flat `or.concave edges, as in the case when common grate-bars are used, it lies upon rounded edges on my l bars. Said rounded edges being serrated, as shown at c e c e, present a very uneven surface to the fuel above,

'thereby admitting the air to more readily permeate said fuel from underneath; and `thus more readily increase combustion. i i

The form ofthe top rod of the bar being of much greater diameter than the adjoining margin or truss P P and arch J, the air passes up and comes in contact with the projecting sides of the b ar A. It is then deected at an angle from a vertical line into the fuel. It also has a great inlluencein keeping the bars cool, 'and thus the. bars are prevented from being overheated and melting down. lAnd, further, the open work of the trussformation also allows a. free circulation of airl through the bars; this provision producing a combination of effects that serve in a great measure to protect them in the most perfect manner known.-

`The serra-tions ornotches on the upper sides are not 'intended to be made or formed deep enough to reach the centre of the top or Isides of the bar A, so that an unbroken line is preserved at those three points or centres, as shown by the red lines U and X X in Fig. III, so that the notches or serrations will not interfere with slicing the tire from above the gratos, or raking it from underneath, by the hook or rake beingrcaught in the notches.

It is obvious that the advantages of my invention as set forth are great, from the fact it is simple in its construction, strong, and ,durable,`also greatly facilitates combustion. It is` also plain that nearly all these advantagescan be attained within thc ordinary bar, as will be seen in thetransverse sectional elevation, Fig. IV, which shows them cast in one piece, and the formationrof the truss-work and notches orserrations on the top corners.

In Figs. III and IV is also seen the lock by which the bars are firmly secured in 'their respective places, in such a manner as 'to form one combined grate, which is a great desideratum, in view ofthe utility and durability of the bars.

I am aware that grate-bars have been made with interlocking Jugs, and that grate-bars have been made with transverse and diagonal cuts across vtheir tops, to provide for` abetter circulation ofiairunder the fuel, but have 'proved failuresLin consequence of the upward-projecting points formed by the said cuts serving as obstructions to the slicingy and raking the tire; also their liability toburn olf. v

Iam alsoaware that pipeslutveV been used or designed for grate-bars, so that they would serve as a waterheating mediuin in connection with the boiler; so, of course, they have a round form.

I am stillfurther aware that bars have been made withpartially-round or oval tops, and corrugations over the tops.l I i I- do not claim any of the above; but

What I do claim, and desire to secure by Letters Patent of the United States, "is-l 1. The grate-bar A, provided with serrations or indentations upon the upper slope of said bar, as herein shown and described, and for the purposes set forth.;

:2. Also, the ky D, in combination with the slots F F, for the purpose of locking the bars, substantially as shown and described.

3. The combination of the open truss-work with the bar A, provided with serrations, and intel-locked by an independent key, when constructed as shownand described, and forthe purposesset forth.

" i O. H. TAYLOR.

Witnesses:

WM. C; LocKn,

B. WooDARD. 

